I want to set up a VFT window shelf (and perhaps a shadier Drosera shelf under it...) outside a third story bedroom window. The shelf would be mounted on the side of a brick chimney facing south-by-southwest, and would be shaded until mid-day by the house, then would receive full sun the rest of the day.
The potential problem I'm wondering about is a streetlight that's mounted on a pole in the back yard. It sits at the same height and is only about 40 feet (~13 meters) west from the shelf's spot and shines directly on it. It isn't a stunning amount of light, but it's FAR brighter than a full moon and lights that wall from dusk to dawn.
So, I see a lot of discussions about photoperiods and adequate amounts of light, but I can't find anything about an adequate amount of *dark*. Do VFT's need a nice dark night period or can they do ok in a "white nights" situation - like, say, 40 feet from a 150-watt High Pressure Sodium streetlight?
I'm guessing the answer is "no," and I'm going to need to find a new spot or rig up something to give them a dark night. But I don't know, and I'm guessing someone here does.